Taking the emergency contraceptive pill breast pain, leukorrhea is considered to be related to the adverse drug reaction, pregnancy, breast nodules and gynecological inflammation. 1. Adverse drug reactions: As the emergency contraceptive pill is a progestin preparation, breast tissue contains progesterone receptors, progesterone can promote breast follicular cell proliferation, so the patient will appear to take the breast swelling discomfort; at the same time, as progesterone will make the cervical mucus become sticky, so the patient will also appear to have a high amount of leukorrhea. 2. Pregnancy: If the patient does not take emergency contraceptive pills within the prescribed time, the patient will have contraceptive failure, the possibility of pregnancy, due to the pregnancy of estrogen and progesterone levels in the body rise significantly, the patient will experience chest pain, leukorrhea and other discomforts. 3. Breast nodules and gynecological inflammation: if the patient has breast nodules, there will be different degrees of breast swelling and pain after taking the pill; if the patient has vaginitis, pelvic inflammatory disease and other gynecological inflammation, it will also be manifested as leukorrhea, vulvar itching, abdominal pain and other discomforts. For patients with breast pain and leukorrhea after taking emergency contraceptive pills, it is recommended that they go to the gynecology department of a regular hospital for consultation and active treatment under the guidance of a doctor after clarifying the cause of the disease.